I have amended title to add "(Education)". JreJRe has also indicated "Education" edition in their forum profile. So full marks there.
This post may be of interest, Help with setting up Zorin OS lite education for a classroom
But I remember another user trying to lock down Zorin PC's for classroom use. I will post another link if I find it.
Here is another thread that may be of interest: Education - One-Shot script to Set up Automatic Student Drive Mapping + More
But it is still not the one I was thinking of.